I've been thinking about replacing the bulbs in my headlight assembly so I can feel safer driving at night. From factory, these headlights have barely any night range and it's horrendous in the rain - so I almost never drive my car at night if I can avoid it. It also doesn't help that most local roads have no reflectors. I'm looking at buying from these guys https://www.dragonworksperformance.com/product/aston-martin-led-headlights/ but my google searches for bulb compatibility for the DB9 are turning up fruitless. Does anyone know what bulb size I should be choosing from this chart?

 

Changing your bulbs won't make a huge difference, the headlight design (reflector bulbs, cutoffs and lens) are a really poor design and wonn't produce a good bright beam pattern whatever bulb you use.

I ended up changing the entire insides of the headlights to be able to see at night, see link below

https://db9s.com/upgraded-aston-martin-headlights/